TeXstudio is a fully featured LaTeX editor. It is designed to make writing LaTeX documents as easy and comfortable as possible. It features an integrated PDF viewer with (almost) word-level synchronization, live inline preview, advanced syntax highlighting, and live checking of references, citations, LaTeX commands, spelling, and grammar.

Paperwork is a GUI to make papers easily searchable using OCR.
The basic idea behind Paperwork is "scan & forget" : You should be able to just scan a new document and forget about it until the day you need it again.